Define cofficient of surface expansion. Write its SI unit.

What do you mean by good and bad conductor? Give some examples of each. Define co-efficient of thermal expansion of solids. What is its SI unit.

Define Co-efficient of Viscosity of a liquid. Write its S.I Unit.

The unit of surface density of charge in SI is

Define coefficient of thermal conductivity. What is its SI unit ?

Write the unit of coefficient of volume expansion of the substance.

Write the unit of coefficient of cubic expansion of the substance.

Define impulse. Write down its S.I. unit.

Define the term 'conductivity' of a metallic wire. Write its SI unit.

What is meant by activity of a radioactive sunstance? Write its SI unit.

Write the unit of coefficient of linear expansion of the substance.